hi - I'm having issues building a pex binary for different platforms. As a sanity check I'm trying to build a pex binary with

platforms

set to my current platform, which I'm looking up by running

pex --help

on my local system. Building the pex with

platforms

unset succeeds, but building the pex with the platform set to my system's string fails with a missing package error (pasted below). What would be the difference between running

pants package

in these two ways?

ERROR: Could not find a version that satisfies the requirement grpc-google-iam-v1
ERROR: No matching distribution found for grpc-google-iam-v1

I would think this means nothing is distributed for the platform you have selected and is an issue with what is hosted on the registry this is expected to be pulled from and not specifically Pants.

A platform build assumes the platform is foreign and requires wheels: https://pypi.org/project/grpc-google-iam-v1/#files

Hello!

A platform build assumes the platform is foreign and requires wheels:

See the warning at https://www.pantsbuild.org/docs/awslambda-python#step-3-run-package for more about this

Ok, the solution is the Pex

--resolve-local-platforms

flag which you can set up either in the

pex_binary.resolve_local_platforms=True

bool field or else globally via

[pex-binary-defaults] resolve_local_platforms = True

ah ok that makes sense that it would be looking for a built version for the platform. Running with --resolve-local-platforms seems not to be working though likely something I'm doing, but yea makes sense that it wouldn't work as a solution in the long run. and ok, I believe I saw another thread on here about setting that up, or setting up a way to build the package from within Docker for the target system. I'll take a closer look, thank you!